scaffolding
noun
[ ˈskafəʊldɪŋ ]
• a temporary structure on the outside of a building, made of wooden planks and metal poles, used by workmen while building, repairing, or cleaning the building.
• "two of the shops had scaffolding against them"
scaffold
verb
• attach scaffolding to (a building).
• "they scaffolded the building, then removed the roof"
Origin:
Middle English (denoting a temporary platform from which to repair or erect a building): from Anglo-Norman French, from Old French ( e)schaffaut, from the base of catafalque.